11654540166021 has 16 divisors (see below), whose sum is σ = 15580943664000. Its totient is φ = 7748941082688.

The previous prime is 11654540166001. The next prime is 11654540166067. The reversal of 11654540166021 is 12066104545611.

It is not a de Polignac number, because 11654540166021 - 2⁹ = 11654540165509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11654540166001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1460926 + ... + 5044143.

It is an arithmetic number, because the mean of its divisors is an integer number (973808979000).

Almost surely, 2^{11654540166021} is an apocalyptic number.

It is an amenable number.

11654540166021 is a deficient number, since it is larger than the sum of its proper divisors (3926403497979).

11654540166021 is an equidigital number, since it uses as much as digits as its factorization.

11654540166021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506668.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 11654540166021 in words is "eleven trillion, six hundred fifty-four billion, five hundred forty million, one hundred sixty-six thousand, twenty-one".